Improvement in bolt-works for safe and vault doors



A 2Sheets-Sheet2. M. BRIGGS.

Bult-Works for Safe yand Vault Doors.

|{(},l19,l-)3 v Patented March 31,1874.

* UNITED STATES A PATENT GFFIOE.

MARTIN BRIGGS, OF ROCHESTER, NFV YORK.'

IMPROVEMENT IN BOLT-WORKS FOR-SFE AND VAULT DOORS.

Specification forming part of Letters Patent No. 149,193, dated March 3l, 1874 application liled February 17, 1874.

To' all whom it may concern Be it known that I, MARTIN BRIGGs, of

Rochester, inthe county of Monroe and State of New York, have invented certain new and useful Improvements in Bolt-Iork for Fire- Proof Safes and Vault-Doors, of which the following is a specication:

This invention relates toa system of boltwork for closing the crevice or space between the door and casing of a safe, in order to prevent the entrance ot' re and water, and the operation of burglars.

This invention consists in applying, to the back plate of a re or burglar proof safe, an upper and lower horizontal plate having vertical arms, eaeh ot which arms is provided with a double rack, arranged in relation to pinion-arbors, for operating the said arms and plates to cause them to `have a vertical movement, so that they can be projected into a recess in the door-casin g, or withdrawn therefrom as hereinafter described. rlhe invention also consists in arr( nging, on the back ot' the safe-door, vertical sliding` plates or bolts, each plate having two horizontal arms provided with. racks,'arran ged in rela-tion to the operative pinions, and combined with upper and lower horizontal plates having vertical arms, each provided with double racks, which mesh into the said pinions, in 'such a manner that by rotating the pinions the plates are caused to have a simultaneous and positive vertical and horizontal motion imparted to them, as

hereinafter described.

, In the drawings, Figure l is an elevation of the back of a safe-door, representing my boltwork applied thereto, and also a section ofthe door-casin 0. Fig. 2 is a detail view, representin g the form and arrangements ot' the bolts.

The body A of the safe and the door B are constructed in the usual manner, and the latter is provided with suitable locking devices, in addition to the bolt-work for closing the space between the door and the casing, which forms the subject-matter of the present invention. To the back plate of the safe-door are applied a series of bolts or sliding plates, two of which, lettered C C, are located, respectively, at the top and bottom of the door, so as to move in a vertical plane. At the sides ot' the door are arranged two corresponding plates or bolts, C C', which move horizontally in respect to the door and casi-noz The plates or bolts C C are each provided with a vertical arm, D, having near the top and bottom a series of teeth or rack-surfaces, c d c d', and

the plates or bolts C C are provided with double horizontally-projccting arms D D',

`which are formed with rack-surfaces c c fj" near their outer or free ends. rlhe plates arranged around the margin of the door, as described, are designed to be forcedin an outward direction from the door-frame, for causin the same to enter grooves or recesses in the door-casing, in order to close the crevice or space left between the edges ofthe door and the mouth in the door-frame, by which means the safe is rendered proof against the entrance of ire and water, and the attacks of burglars. The sliding bolts or plates are guided or steadied in their movement by fixed studs or pins a, which pass through slots I), made in the bolts and in the arms ofthe same. A positive andperfect movement is imparted to the bolt-work through the medium of a pair of pinion-arbors, F F, to one ot' which is applied a knob or handle for turning the same. The teeth of the pinion-arbors are made long enough to engage both with the arms of the bolts which move vertically and horizontally. One pinion is, therefore, made to engage with the rack-surfaces el and c of the verticallymovable arm, and the corresponding racks c c ofthe upper arms of the horizontally-sliding bolts, while the other pinion gears into the racks c d and j' j" ofthe vertically and horizontally moving bolts. The arms ot' one pair ofthe bolts are bent in the manner shown at H, so as to form a central space for the reception of a lock, G, which is employed for retaining the bolts in a locked-position after theyhave been projected into the door-casing,

The pinion-arbors and rack-arms, combined with the locking-bolts, as proposed by me, will permit the latter to be operated in a most perfect and expeditious manner, thus enabling the bolts to be projected into the grooves or recesses formed in the door-casing, or to be retracted therefrom with the greatest ease and facility. The bolt-work for closing the crevice or space between the door and its casing is Il sed as an auxiliary device in connection with elther permutation or other locks, thus enabling safes to be protected in a perfect manner.

The bolt-work, being attached directly to the back plate of the door, is exposed to view, and can. be readily applied in position.

/Vhat I claim is- 1. The plates C C, having arms D7 each arm having double racks, as shown, when combined and arranged in co-operative relation to the operative pinion-arbors F F, and adapted to be applied to the back of a re or burglar proof safe or vault door7 substantially as and for the purpose set forth.

2. The plates C C', having double arms D D and racks e e f f', combined with the operative pinions F F and plates or bolts C C, having arms D and racks c d, substantially as described, for the purpose speciied.

In testimony that I claim the foregoing I have hereunto set my hand this 2d day of February7 1874.

MARTIN BRIGGS.

Witnesses W. J. PEYTON, A. H. NORRIS. 

